Free flash space in the example is 182,394,880 bytes. The show flash0: command in Figure 3 is used to verify free flash size. Compare the free flash space with the new image file size. The amount of free flash can be verified using the show flash0: command. Ensure that there is sufficient flash space on the router that is being upgraded. The output in Figure 2 shows the TFTP server is accessible from the router. Download the file from and transfer it to the TFTP server. Select a Cisco IOS image file that meets the requirements in terms of platform, features, and software. A new image file (3.bin) will be copied from the TFTP server at 2001:DB8:CAFE:100::99 to the router.įollow these steps to upgrade the software on the Cisco router: This example uses IPv6 for the transfer to show that TFTP can also be used across IPv6 networks.įigure 1 illustrates copying a Cisco IOS software image from a TFTP server. Cisco consistently releases new Cisco IOS software versions to resolve caveats and provide new features.
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